Line data    Source code

       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2022, 2024 Taler Systems SA
       4             : 
       5             :    TALER is free software; you can redistribute it and/or modify it under the
       6             :    terms of the GNU General Public License as published by the Free Software
       7             :    Foundation; either version 3, or (at your option) any later version.
       8             : 
       9             :    TALER is distributed in the hope that it will be useful, but WITHOUT ANY
      10             :    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
      11             :    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
      12             : 
      13             :    You should have received a copy of the GNU General Public License along with
      14             :    TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
      15             :  */
      16             : /**
      17             :  * @file exchangedb/pg_select_kyc_attributes.c
      18             :  * @brief Implementation of the select_kyc_attributes function for Postgres
      19             :  * @author Christian Grothoff
      20             :  */
      21             : #include "taler/platform.h"
      22             : #include "taler/taler_error_codes.h"
      23             : #include "taler/taler_dbevents.h"
      24             : #include "taler/taler_pq_lib.h"
      25             : #include "pg_select_kyc_attributes.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : /**
      30             :  * Closure for #get_attributes_cb().
      31             :  */
      32             : struct GetAttributesContext
      33             : {
      34             :   /**
      35             :    * Function to call per result.
      36             :    */
      37             :   TALER_EXCHANGEDB_AttributeCallback cb;
      38             : 
      39             :   /**
      40             :    * Closure for @e cb.
      41             :    */
      42             :   void *cb_cls;
      43             : 
      44             :   /**
      45             :    * Plugin context.
      46             :    */
      47             :   struct PostgresClosure *pg;
      48             : 
      49             :   /**
      50             :    * Key of our query.
      51             :    */
      52             :   const struct TALER_NormalizedPaytoHashP *h_payto;
      53             : 
      54             :   /**
      55             :    * Flag set to #GNUNET_OK as long as everything is fine.
      56             :    */
      57             :   enum GNUNET_GenericReturnValue status;
      58             : 
      59             : };
      60             : 
      61             : 
      62             : /**
      63             :  * Invoke the callback for each result.
      64             :  *
      65             :  * @param cls a `struct GetAttributesContext *`
      66             :  * @param result SQL result
      67             :  * @param num_results number of rows in @a result
      68             :  */
      69             : static void
      70           7 : get_attributes_cb (void *cls,
      71             :                    PGresult *result,
      72             :                    unsigned int num_results)
      73             : {
      74           7 :   struct GetAttributesContext *ctx = cls;
      75             : 
      76           9 :   for (unsigned int i = 0; i < num_results; i++)
      77             :   {
      78             :     struct GNUNET_TIME_Timestamp collection_time;
      79             :     struct GNUNET_TIME_Timestamp expiration_time;
      80             :     size_t enc_attributes_size;
      81             :     void *enc_attributes;
      82             :     char *provider;
      83           2 :     struct GNUNET_PQ_ResultSpec rs[] = {
      84           2 :       GNUNET_PQ_result_spec_string ("provider_name",
      85             :                                     &provider),
      86           2 :       GNUNET_PQ_result_spec_timestamp ("collection_time",
      87             :                                        &collection_time),
      88           2 :       GNUNET_PQ_result_spec_timestamp ("expiration_time",
      89             :                                        &expiration_time),
      90           2 :       GNUNET_PQ_result_spec_variable_size ("encrypted_attributes",
      91             :                                            &enc_attributes,
      92             :                                            &enc_attributes_size),
      93             :       GNUNET_PQ_result_spec_end
      94             :     };
      95             : 
      96           2 :     if (GNUNET_OK !=
      97           2 :         GNUNET_PQ_extract_result (result,
      98             :                                   rs,
      99             :                                   i))
     100             :     {
     101           0 :       GNUNET_break (0);
     102           0 :       ctx->status = GNUNET_SYSERR;
     103           0 :       return;
     104             :     }
     105           2 :     ctx->cb (ctx->cb_cls,
     106             :              ctx->h_payto,
     107             :              provider,
     108             :              collection_time,
     109             :              expiration_time,
     110             :              enc_attributes_size,
     111             :              enc_attributes);
     112           2 :     GNUNET_PQ_cleanup_result (rs);
     113             :   }
     114             : }
     115             : 
     116             : 
     117             : enum GNUNET_DB_QueryStatus
     118           7 : TEH_PG_select_kyc_attributes (
     119             :   void *cls,
     120             :   const struct TALER_NormalizedPaytoHashP *h_payto,
     121             :   TALER_EXCHANGEDB_AttributeCallback cb,
     122             :   void *cb_cls)
     123             : {
     124           7 :   struct PostgresClosure *pg = cls;
     125           7 :   struct GNUNET_PQ_QueryParam params[] = {
     126           7 :     GNUNET_PQ_query_param_auto_from_type (h_payto),
     127             :     GNUNET_PQ_query_param_end
     128             :   };
     129           7 :   struct GetAttributesContext ctx = {
     130             :     .cb = cb,
     131             :     .cb_cls = cb_cls,
     132             :     .pg = pg,
     133             :     .h_payto = h_payto,
     134             :     .status = GNUNET_OK
     135             :   };
     136             :   enum GNUNET_DB_QueryStatus qs;
     137             : 
     138           7 :   PREPARE (pg,
     139             :            "select_kyc_attributes",
     140             :            "SELECT "
     141             :            " lp.provider_name"
     142             :            ",ka.collection_time"
     143             :            ",ka.expiration_time"
     144             :            ",ka.encrypted_attributes"
     145             :            " FROM kyc_attributes ka"
     146             :            " JOIN legitimization_processes lp"
     147             :            "   ON (ka.legitimization_serial = lp.legitimization_process_serial_id)"
     148             :            " WHERE ka.h_payto=$1");
     149           7 :   qs = GNUNET_PQ_eval_prepared_multi_select (
     150             :     pg->conn,
     151             :     "select_kyc_attributes",
     152             :     params,
     153             :     &get_attributes_cb,
     154             :     &ctx);
     155           7 :   if (GNUNET_OK != ctx.status)
     156           0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     157           7 :   return qs;
     158             : }